CN114466581A - Multi-stage corrugated wave-absorbing material and preparation method and application thereof - Google Patents
Multi-stage corrugated wave-absorbing material and preparation method and application thereof Download PDFInfo
- Publication number
- CN114466581A CN114466581A CN202210143688.3A CN202210143688A CN114466581A CN 114466581 A CN114466581 A CN 114466581A CN 202210143688 A CN202210143688 A CN 202210143688A CN 114466581 A CN114466581 A CN 114466581A
- Authority
- CN
- China
- Prior art keywords
- corrugated
- carbon fiber
- absorbing material
- wave
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0075—Magnetic shielding materials
- H05K9/0077—Magnetic shielding materials comprising superconductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention provides a multi-stage corrugated wave-absorbing material and a preparation method and application thereof, and relates to the technical field of metamaterials. The invention provides a multi-stage corrugated wave-absorbing material, which comprises an upper panel, a lower panel and a corrugated sandwich microstructure composite plate arranged between the upper panel and the lower panel; the upper panel is a glass fiber plate; the lower panel is a carbon fiber reflecting plate; the corrugated sandwich microstructure composite board comprises a corrugated sandwich board and a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich board; the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner; the corrugated sandwich board comprises a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer. The multi-stage corrugated wave-absorbing material provided by the invention has excellent compression strength while realizing high-efficiency electromagnetic absorption at a wide frequency and a wide angle.
Description
Technical Field
The invention relates to the technical field of metamaterials, in particular to a multi-stage corrugated wave-absorbing material and a preparation method and application thereof.
Background
Stealth technology has become a technological high place for competition and robbery of countries in modern informatization war. The most efficient stealth method at present is to realize stealth through the design of an electromagnetic metamaterial, and the metamaterial is a manually designed subwavelength periodic structural material which does not exist in the natural world. The electromagnetic metamaterial wave-absorbing structure has the characteristics of wide width, strong strength, wide width and thin thickness, namely, the wave-absorbing frequency band is extremely wide, the wave-absorbing efficiency is extremely high, the effective incident angle is wide, the structure is ultra-light and ultra-thin, and the electromagnetic metamaterial wave-absorbing structure has excellent application prospect in the fields of aircrafts and the like which need to be stealthed.
Although metamaterial stealth has incomparable advantages over other stealth approaches, researchers have focused more on the design of electromagnetic performance studies, ignoring the difficulties that arise in their specific applications, such as strength-bearing problems. The existing method is mostly simple adhesive composite, the bending strength of the structure is often reduced greatly, the bearing capacity is reduced, and the electromagnetic performance is greatly influenced, so that the design of the stealth and bearing integrated metamaterial wave-absorbing structure is very important.
Disclosure of Invention
The invention aims to provide a multi-stage corrugated wave-absorbing material, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a multi-stage corrugated wave-absorbing material, which comprises an upper panel, a lower panel and a corrugated sandwich microstructure composite plate arranged between the upper panel and the lower panel;
the upper panel is a glass fiber plate; the lower panel is a carbon fiber reflecting plate;
the corrugated sandwich microstructure composite board comprises a corrugated sandwich board and a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich board; the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner;
the corrugated sandwich board comprises a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer.
Preferably, the carbon fiber array units arranged on the upper surface and the lower surface of the corrugated sandwich plate are symmetrically distributed.
Preferably, the carbon fiber array unit is arranged on the inclined surface of the corrugated sandwich plate; the plurality of carbon fiber array units are arranged periodically.
Preferably, the gradient profile is a length gradient profile; in the same carbon fiber array unit, the length of the carbon fiber strip is linearly increased from top to bottom along the inclined surface of the corrugated sandwich board; the length difference of two adjacent carbon fiber strips is 0.5-1 mm; the length of top layer carbon fiber strip is 2 ~ 3 mm.
Preferably, in the same carbon fiber array unit, the distance between two adjacent carbon fiber strips is 0.5-1 mm; the width of the carbon fiber strip is 0.5-1 mm.
Preferably, the corrugated shape of the corrugated sandwich panel is triangular; the corrugation angle of the corrugated sandwich plate is 30-70 degrees.
Preferably, the material of the foam interlayer is polymethacrylimide foam.
The invention provides a preparation method of the multistage ripple wave-absorbing material in the technical scheme, which comprises the following steps:
sequentially laying a first glass fiber prepreg, a foam interlayer and a second glass fiber prepreg from top to bottom between a corrugated female film and a corrugated male die, and fixing to obtain a corrugated sandwich board;
arranging a plurality of carbon fiber array units on the surface of the corrugated sandwich plate to obtain a corrugated sandwich microstructure composite plate;
and fixing the corrugated sandwich microstructure composite board between a glass fiber board and a carbon fiber reflecting board by using a binder to obtain the multistage corrugated wave-absorbing material.
Preferably, the method for arranging the plurality of carbon fiber array units on the surface of the corrugated sandwich panel comprises the following steps: and sewing the carbon fiber strips on the surface of the corrugated sandwich plate.
The invention also provides the application of the multi-stage ripple wave-absorbing material in the technical scheme or the multi-stage ripple wave-absorbing material prepared by the preparation method in the technical scheme in stealth materials.
The invention provides a multi-stage corrugated wave-absorbing material, wherein a glass fiber plate is a wave-transmitting material, so that electromagnetic waves can be transmitted into a wave-absorbing structure, a carbon fiber reflecting plate is a total reflection plate, the electromagnetic waves are prevented from entering and interfering an internal electromagnetic environment, meanwhile, incident electromagnetic waves can be absorbed secondarily, and the absorption efficiency is improved. According to the invention, the corrugated sandwich board has good ventilation and heat dissipation performance, the foam interlayer can well provide lateral support for the glass fiber prepreg panel, and the compression strength of the material is improved. In the invention, the carbon fiber strips are distributed on the corrugated sandwich plate in a gradient manner so as to excite the surface plasmon propagation mode of electromagnetic waves and realize electromagnetic absorption through ohmic loss of the carbon fibers.
The embodiment result shows that by taking the oblique incidence of TE polarized electromagnetic waves of 30 degrees as an example, the multi-stage corrugated wave-absorbing material provided by the invention can basically achieve more than 90% of electromagnetic wave absorption in a C wave band and an X wave band, and can even achieve 100% of perfect absorption near certain frequencies, so that the structural stealth can be effectively realized, and the threat of detection equipment such as ground radar and the like can be greatly reduced. Under the quasi-static compression condition, compared with other multi-stage corrugated structures, the multi-stage corrugated wave-absorbing material provided by the invention has the advantages that the compression strength is improved by 32.71%, and the specific compression strength is improved by 16.67%. Therefore, the multistage corrugated wave-absorbing material provided by the invention can realize high-efficiency electromagnetic absorption at a wide frequency and a wide angle, greatly improve the compression strength of the material, improve the bearing capacity of the structure while realizing stealth performance, realize stealth bearing integrated design and improve the practical application capacity of the electromagnetic metamaterial.
Drawings
FIG. 1 is a schematic structural diagram of a multi-stage corrugated wave-absorbing material and a carbon fiber array unit; 1 denotes an upper face plate, 2 denotes a lower face plate, 3 denotes a corrugated sandwich plate, and 4 denotes a carbon fiber array unit;
FIG. 2 is a flow chart of the production of a multi-stage corrugated wave-absorbing material;
FIG. 3 is an electromagnetic absorption cloud chart of the multi-stage corrugated wave-absorbing material under oblique incidence.
Detailed Description
The invention provides a multi-stage corrugated wave-absorbing material, which comprises an upper panel, a lower panel and a corrugated sandwich microstructure composite plate arranged between the upper panel and the lower panel;
the upper panel is a glass fiber plate; the lower panel is a carbon fiber reflecting plate;
the corrugated sandwich microstructure composite board comprises a corrugated sandwich board and a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich board; the carbon fiber array unit consists of carbon fiber strips in gradient distribution;
the corrugated sandwich board comprises a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer.
The invention provides a multi-stage corrugated wave-absorbing material which comprises an upper panel. In the present invention, the upper panel is a glass fiber plate. The invention adopts the glass fiber board as the upper panel, and can ensure that the electromagnetic wave is transmitted into the wave-absorbing structure. In the present invention, the thickness of the upper plate is preferably 0.2 to 1mm, and more preferably 0.4 to 0.6 mm.
The multi-stage corrugated wave-absorbing material provided by the invention comprises a lower panel arranged right below an upper panel. In the invention, the lower panel is a carbon fiber reflecting plate. According to the invention, the carbon fiber reflecting plate is used as the lower panel, so that electromagnetic waves can be prevented from entering and interfering the internal electromagnetic environment, incident electromagnetic waves can be absorbed for the second time, and the absorption efficiency is improved. In the present invention, the lower plate preferably has a thickness of 0.2 to 1mm, more preferably 0.4 to 0.6 mm.
The multi-stage corrugated wave-absorbing material provided by the invention comprises a corrugated sandwich microstructure composite plate arranged between an upper panel and a lower panel. In the invention, the total thickness of the corrugated sandwich microstructure composite board is preferably 20-25 mm, and more preferably 22.5 mm. In the invention, the corrugated sandwich microstructure composite board comprises a corrugated sandwich board and a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich board.
In the invention, the corrugated sandwich panel comprises a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer. In the present invention, the material of the foam interlayer is preferably polymethacrylimide foam. In the present invention, the foam interlayer has a relative dielectric constant of 1.27. In the invention, the density of the polymethacrylimide foam is preferably 100-250 kg/m3More preferably 220kg/m3. The invention adopts stronger high-density polymethacrylimide foam, can ensure that the failure mode is controlled by a thin glass fiber panel in the compression process, and improves the compression strength. In the invention, the thickness of the foam interlayer is preferably 4-6 mm, and more preferably 4.7 mm. In the invention, the thickness of the glass fiber prepreg panel is preferably 0.1-1 mm, and more preferably 0.2-0.5 mm.
In the present invention, the corrugated shape of the corrugated sandwich panel is preferably triangular; the corrugated angle of the corrugated sandwich plate is preferably 30-70 degrees, and more preferably 70 degrees. In the invention, the corrugation angle refers to an included angle between an inclined surface of the corrugated sandwich plate and a horizontal plane.
The multi-stage corrugated wave-absorbing material provided by the invention comprises a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich panel. In the present invention, the carbon fiber array units disposed on the upper surface and the lower surface of the corrugated sandwich panel are preferably symmetrically distributed. In the invention, the surface layer from the wave crest to the adjacent wave trough of the corrugated sandwich plate is an inclined surface of the corrugated sandwich plate; the carbon fiber array unit is preferably arranged on the inclined surface of the corrugated sandwich plate; a plurality of the carbon fiber array units are preferably arranged periodically.
In the invention, the carbon fiber array units are preferably distributed on the inclined surface of the corrugated sandwich plate; the distance between the top end of the carbon fiber array unit and the wave crest is preferably 0.2-1 mm; the distance between the bottom end of the carbon fiber array unit and the trough is preferably 0.2-1 mm.
In the invention, the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner; the gradient profile is preferably a length gradient profile. In the present invention, in the same carbon fiber array unit, the length of the carbon fiber strip preferably increases linearly from top to bottom along the inclined surface of the corrugated sandwich panel. In the invention, the length difference between two adjacent carbon fiber strips is preferably 0.5-1 mm, and more preferably 0.5 mm. In the invention, the length of the top layer carbon fiber strip is preferably 2-3 mm. In the invention, the length of the bottom carbon fiber strip is preferably 18-24 mm. In the invention, in the same carbon fiber array unit, the distance between two adjacent carbon fiber strips is preferably 0.5-1 mm, and more preferably 0.5 mm; the width of the carbon fiber strip is preferably 0.5-1 mm.
In the invention, the total height of the multi-stage corrugated wave-absorbing material is preferably 20-25 mm, and more preferably 22.5 mm. The multi-stage ripple wave-absorbing material provided by the invention can effectively absorb incident electromagnetic waves in a C wave band and an X wave band, and has excellent compression strength.
The invention provides a preparation method of the multistage ripple wave-absorbing material in the technical scheme, which comprises the following steps:
sequentially laying a first glass fiber prepreg, a foam interlayer and a second glass fiber prepreg from top to bottom between a corrugated female film and a corrugated male die, and fixing to obtain a corrugated sandwich board;
arranging a plurality of carbon fiber array units on the surface of the corrugated sandwich plate to obtain a corrugated sandwich microstructure composite plate;
and fixing the corrugated sandwich microstructure composite board between a glass fiber board and a carbon fiber reflecting board by using a binder to obtain the multistage corrugated wave-absorbing material.
According to the invention, a first glass fiber prepreg, a foam interlayer and a second glass fiber prepreg are sequentially laid between a corrugated female film and a corrugated male die from top to bottom and are fixed to obtain the corrugated sandwich board. In the present invention, the glass fiber prepreg has a relative dielectric constant of 4.3. In a specific embodiment of the invention, a first glass fiber prepreg is laid on a female die, a foam interlayer is attached to the first glass fiber prepreg, a second glass fiber prepreg is laid, the foam interlayer is sandwiched between the glass fiber prepregs, and the male die and the glass fiber prepregs are fixed by using the viscosity of the male die and the glass fiber prepregs to obtain the corrugated sandwich panel. In the present invention, the female and male mold surfaces are preferably coated with a release agent.
According to the invention, the foam interlayer is preferably polished, the sewing holes are positioned, and then the foam interlayer and the glass fiber prepreg are compounded to manufacture the corrugated sandwich panel. The sewing holes are arranged to facilitate subsequent sewing of the carbon fiber strips.
After the corrugated sandwich board is obtained, the surface of the corrugated sandwich board is provided with a plurality of carbon fiber array units, so that the corrugated sandwich microstructure composite board is obtained. In the present invention, the specific structure of the carbon fiber array unit is the same as the structure of the carbon fiber array unit described above, and is not described herein again.
In the present invention, the method for arranging a plurality of carbon fiber array units on the surface of the corrugated sandwich panel preferably includes: and sewing the carbon fiber strips on the surface of the corrugated sandwich plate. According to the invention, the carbon fiber strips are utilized to sew the foam interlayer in the corrugated sandwich board and the glass fiber prepreg panel together, so that the buckling of the glass fiber prepreg panel can be inhibited, and the compression bearing performance of the multi-stage corrugated wave-absorbing material is greatly improved. In the present invention, the carbon fiber strips are preferably long carbon fiber prepregs having a width of 1 mm. In the invention, the electric conductivity of the carbon fiber strips along the fiber direction is preferably 25000-35000S/m, and more preferably 35000S/m; the conductivity perpendicular to the fibre direction is preferably 89S/m.
In a specific embodiment of the present invention, the method of suturing comprises: one end of the carbon fiber strip horizontally penetrates through the first hole, then penetrates back to the other hole from the same layer, is attached to the other end of the glass fiber surface, and then the operation is repeated until the last layer of carbon fiber threading is completed, and finally a carbon fiber array unit is formed.
According to the invention, preferably, after the sewing, the corrugated sandwich microstructure composite board is thermally cured to obtain the corrugated sandwich microstructure composite board. In the present invention, the temperature of the thermal curing is preferably 120 ℃; the time for thermal curing is preferably 1.5-2 h; the pressure for thermal curing is preferably 0.8 to 1 standard atmosphere, and more preferably 1 standard atmosphere. In the present invention, the heat curing is preferably performed in a press mold. According to the invention, the carbon fiber strips and the corrugated sandwich board can be tightly attached through thermosetting, so that the wave absorbing performance is improved.
After the corrugated sandwich microstructure composite board is obtained, the invention fixes the corrugated sandwich microstructure composite board between a glass fiber board and a carbon fiber reflecting board by using a binder, thereby obtaining the multilevel corrugated wave-absorbing material. In the present invention, the adhesive is preferably an epoxy glue. In the present invention, the method of fixing preferably includes: and fixing the positions of the glass fiber plate, the carbon fiber reflecting plate and the corrugated sandwich microstructure composite plate by adopting a clamping or briquetting method. In the invention, after the position is fixed, the obtained composite structure is preferably solidified to obtain the multi-stage corrugated wave-absorbing material. In the present invention, the method of curing preferably comprises: standing for 24 hours at normal temperature or keeping the temperature for 2 hours at the temperature of 40-60 ℃. The invention preferably removes the holding device after said curing, cleaning the surface adhesive and dirt.
The invention also provides an application of the multi-stage ripple wave-absorbing material in the technical scheme or the multi-stage ripple wave-absorbing material prepared by the preparation method in the technical scheme in stealth materials, and the multi-stage ripple wave-absorbing material is preferably used as a stealth material to be applied to an airplane structure. The invention not only improves the light-weight bearing efficiency of the wave-absorbing material, but also endows the wave-absorbing material with excellent electromagnetic absorption performance, and realizes the stealth bearing integrated design.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Fig. 1 is a schematic structural diagram of a multi-stage corrugated wave-absorbing material and a carbon fiber array unit, wherein (a) in fig. 1 is a perspective view of the multi-stage corrugated wave-absorbing material; fig. 1 (b) is a cross-sectional view of the multi-stage corrugated wave-absorbing material. The multi-stage corrugated wave-absorbing material consists of an upper panel 1, a lower panel 2 and a corrugated sandwich microstructure composite board arranged between the upper panel 1 and the lower panel 2; the upper panel is a glass fiber plate; the lower panel is a carbon fiber reflecting plate; the corrugated sandwich microstructure composite board consists of a corrugated sandwich board 3 and a plurality of carbon fiber array units 4 arranged on the surface of the corrugated sandwich board; the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner; the corrugated sandwich board 3 consists of a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer; the foam interlayer is a polymethacrylimide foam core.
In FIG. 1, px＝30mm、py25.5mm represents the length of the periodic carbon fiber array unit along the x direction and the y direction respectively, the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner and is in a pyramid configuration, and l13mm represents the length of the carbon fiber strip at the top layer of the carbon fiber array unit, and delta 0.5 represents the length change gradient of the carbon fiber strip in the carbon fiber array unit, sc0.5mm and wc1mm represents the width and spacing, s, of the carbon fiber strands, respectivelyf2mm and wf5mm respectively represents the bevel width of the polymethacrylimide foam core and the distance between two adjacent foam cores, t1、t2And t3Thickness, t, of the upper panel, the lower panel and the glass fiber prepreg panel, respectively1＝t2＝0.6mm、t3＝0.2mm。
FIG. 2 is a flow chart of the preparation of a multi-stage corrugated wave-absorbing material. First, a material was prepared, which was a glass fiber prepreg (FR4) having a relative dielectric constant of 4.3 and a density of 220kg/m3And the relative dielectric constant of the polymethacrylimide foam is 1.27, and carbon fiber prepreg with conductivity of 35000S/m along the fiber direction and conductivity of 89S/m perpendicular to the fiber direction is adopted.
And polishing the foam into strips with the side lengths of 5mm and 23.4mm respectively, and punching and calibrating the suture holes.
And (3) coating a release agent on the mould once every 10 minutes for three times, so that the mould is convenient to release.
Laying a first glass fiber prepreg on a female die, then attaching a prepared foam strip to the first glass fiber prepreg, laying a second glass fiber prepreg, clamping the foam strip between the glass fiber prepregs, and fixing the foam strip by using the viscosity of a male die and the glass fiber prepreg to obtain the corrugated sandwich board.
Cutting the carbon fiber prepreg into strips with the width of 1mm, tightly sewing the glass fiber prepreg and the foam together by using the carbon fiber prepreg strips according to the previous sewing holes, closing the male die, pressurizing by using a bolt, putting into an oven, curing at 120 ℃ for 2 hours, and then demoulding and taking out to obtain the corrugated sandwich microstructure composite board.
Cutting a glass fiber board and a carbon fiber reflecting board, coating epoxy resin glue on the manufactured corrugated sandwich microstructure composite board, placing the corrugated sandwich microstructure composite board between the glass fiber board and the carbon fiber reflecting board, applying pressure by a pressurizing block, and curing for 2 hours in a thermostat at 50 ℃; and removing the clamping device after curing, and cleaning epoxy resin glue and dirt on the surface to obtain the multi-stage corrugated wave-absorbing material.
FIG. 3 is an electromagnetic absorption cloud chart of the multi-stage corrugated wave-absorbing material under oblique incidence. As can be seen from FIG. 3, the absorption bandwidth and the absorption rate of the multi-stage corrugated wave-absorbing material prepared by the invention gradually increase from vertical incidence with the increase of the incidence angle, the whole C-band and X-band can achieve more than 95% of electromagnetic wave absorption at 15 degrees of incidence, when the incidence angle increases to 40 degrees, more than 85% of the absorption band is divided into two absorption bands at about 10.5GHz, the absorption performance at low frequency is stable until the incidence angle approaches 60 degrees, but generally, at 4-12 GHz, the absorption rate of the multi-stage corrugated wave-absorbing material can basically achieve more than 80% at different incidence angles.
Comparative example 1
The structure is substantially the same as that of embodiment 1 except that no carbon fiber array unit is provided.
Test example
Under the quasi-static compression condition, the compression strength of the multi-stage corrugated wave-absorbing material provided by the embodiment 1 is 9.21MPa, and the specific compression strength is 0.91 MPa/g. The multi-stage corrugated structure of comparative example 1 had a compressive strength of 6.94MPa and a specific compressive strength of 0.78 MPa/g.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (10)
1. A multi-stage corrugated wave-absorbing material comprises an upper panel, a lower panel and a corrugated sandwich microstructure composite board arranged between the upper panel and the lower panel;
the upper panel is a glass fiber plate; the lower panel is a carbon fiber reflecting plate;
the corrugated sandwich microstructure composite board comprises a corrugated sandwich board and a plurality of carbon fiber array units arranged on the surface of the corrugated sandwich board; the carbon fiber array unit consists of carbon fiber strips distributed in a gradient manner;
the corrugated sandwich board comprises a foam interlayer and glass fiber prepreg panels arranged on two sides of the foam interlayer.
2. The multi-stage corrugated wave-absorbing material of claim 1, wherein the carbon fiber array units arranged on the upper surface and the lower surface of the corrugated sandwich plate are symmetrically distributed.
3. The multi-stage corrugated wave-absorbing material according to claim 1 or 2, wherein the carbon fiber array units are arranged on the inclined surface of the corrugated sandwich plate; the plurality of carbon fiber array units are arranged periodically.
4. The multi-stage corrugated wave absorbing material of claim 1 wherein the gradient profile is a length gradient profile; in the same carbon fiber array unit, the length of the carbon fiber strip is linearly increased from top to bottom along the inclined surface of the corrugated sandwich board; the length difference of two adjacent carbon fiber strips is 0.5-1 mm; the length of the top layer carbon fiber strip is 2-3 mm.
5. The multi-stage corrugated wave-absorbing material of claim 1, wherein in the same carbon fiber array unit, the distance between two adjacent carbon fiber strips is 0.5-1 mm; the width of the carbon fiber strip is 0.5-1 mm.
6. The multi-stage corrugated wave-absorbing material of claim 1, wherein the corrugated shape of the corrugated sandwich plate is triangular; the corrugation angle of the corrugated sandwich plate is 30-70 degrees.
7. The multi-stage corrugation wave-absorbing material as claimed in claim 1, wherein the foam interlayer is made of polymethacrylimide foam.
8. The preparation method of the multistage corrugated wave-absorbing material of any one of claims 1 to 7, which comprises the following steps:
sequentially laying a first glass fiber prepreg, a foam interlayer and a second glass fiber prepreg from top to bottom between a corrugated female film and a corrugated male die, and fixing to obtain a corrugated sandwich board;
arranging a plurality of carbon fiber array units on the surface of the corrugated sandwich board to obtain a corrugated sandwich microstructure composite board;
and fixing the corrugated sandwich microstructure composite board between a glass fiber board and a carbon fiber reflecting board by using a binder to obtain the multistage corrugated wave-absorbing material.
9. The manufacturing method according to claim 8, wherein the method for arranging the plurality of carbon fiber array units on the surface of the corrugated sandwich panel comprises the following steps: and sewing the carbon fiber strips on the surface of the corrugated sandwich panel.
10. The multi-stage corrugated wave-absorbing material of any one of claims 1 to 7 or the multi-stage corrugated wave-absorbing material prepared by the preparation method of any one of claims 8 to 9 is applied to stealth materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210143688.3A CN114466581B (en) | 2022-02-17 | 2022-02-17 | Multistage corrugated wave-absorbing material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210143688.3A CN114466581B (en) | 2022-02-17 | 2022-02-17 | Multistage corrugated wave-absorbing material and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114466581A true CN114466581A (en) | 2022-05-10 |
| CN114466581B CN114466581B (en) | 2023-06-09 |
Family
ID=81414568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210143688.3A Active CN114466581B (en) | 2022-02-17 | 2022-02-17 | Multistage corrugated wave-absorbing material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114466581B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284687A (en) * | 2022-06-23 | 2022-11-04 | 大连理工大学 | Composite material lattice sandwich structure integrating light bearing and wide-angle-range wave absorption |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791118A (en) * | 1995-07-28 | 1998-08-11 | Jordan; Kurt M. | Energy absorbing fiberglass sandwich panel with corrugated core |
| CN101342807A (en) * | 2008-09-01 | 2009-01-14 | 天津工业大学 | Foam sandwich extensional organization composite material and method of producing the same |
| CN201456485U (en) * | 2009-05-26 | 2010-05-12 | 北京东宝亿通科技股份有限公司 | Interlayer for resin-based light stealth dot-matrix composite material |
| WO2017095223A1 (en) * | 2015-12-01 | 2017-06-08 | Vdl Fibertech Industries B.V. | A stitch-reinforced sandwich panel |
| CN212046310U (en) * | 2020-04-02 | 2020-12-01 | 山东北理华海复合材料有限公司 | Multifunctional glass fiber sandwich board |
| CN112898024A (en) * | 2021-01-29 | 2021-06-04 | 中国人民解放军国防科技大学 | Wave-absorbing ceramic wing rudder type component based on functional fiber gradient distribution and preparation method thereof |
| CN215397371U (en) * | 2021-04-30 | 2022-01-04 | 深圳光启高端装备技术研发有限公司 | Antiknock wave-absorbing structure and naval vessel |
-
2022
- 2022-02-17 CN CN202210143688.3A patent/CN114466581B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791118A (en) * | 1995-07-28 | 1998-08-11 | Jordan; Kurt M. | Energy absorbing fiberglass sandwich panel with corrugated core |
| CN101342807A (en) * | 2008-09-01 | 2009-01-14 | 天津工业大学 | Foam sandwich extensional organization composite material and method of producing the same |
| CN201456485U (en) * | 2009-05-26 | 2010-05-12 | 北京东宝亿通科技股份有限公司 | Interlayer for resin-based light stealth dot-matrix composite material |
| WO2017095223A1 (en) * | 2015-12-01 | 2017-06-08 | Vdl Fibertech Industries B.V. | A stitch-reinforced sandwich panel |
| CN212046310U (en) * | 2020-04-02 | 2020-12-01 | 山东北理华海复合材料有限公司 | Multifunctional glass fiber sandwich board |
| CN112898024A (en) * | 2021-01-29 | 2021-06-04 | 中国人民解放军国防科技大学 | Wave-absorbing ceramic wing rudder type component based on functional fiber gradient distribution and preparation method thereof |
| CN215397371U (en) * | 2021-04-30 | 2022-01-04 | 深圳光启高端装备技术研发有限公司 | Antiknock wave-absorbing structure and naval vessel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284687A (en) * | 2022-06-23 | 2022-11-04 | 大连理工大学 | Composite material lattice sandwich structure integrating light bearing and wide-angle-range wave absorption |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114466581B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107946763B (en) | Wave-absorbing and wave-transmitting integrated metamaterial antenna housing and application thereof | |
| CN102868021B (en) | A kind of High-performance frequency selection radar cover | |
| CN102343680A (en) | Mould and method for integrally forming fiber reinforced hexagonal honeycomb-structured core | |
| CN105186131B (en) | The preparation method of multilayer FSS antenna house anti-medium substrate delaminations | |
| CN110972459B (en) | Wood-plastic composite wave-absorbing material and preparation method thereof | |
| CN109167181A (en) | A kind of graphical cellular unit broadband periodic absorbent structure | |
| CN102615883A (en) | 150 DEG C resistant foam interlayer wave-absorbing composite material and preparation method thereof | |
| CN105161803A (en) | Graphene film frequency selective surface | |
| CN111224245B (en) | Honeycomb electromagnetic wave-absorbing reinforcing structure | |
| CN114466581A (en) | Multi-stage corrugated wave-absorbing material and preparation method and application thereof | |
| CN113942284B (en) | Honeycomb interlayer wave-absorbing material for improving oblique incidence wave-absorbing performance and preparation method thereof | |
| CN109742554B (en) | Double-frequency Ku waveband circularly polarized sensitive wave absorber | |
| CN114389051A (en) | Grid electromagnetic wave absorbing structure and preparation method and application thereof | |
| CN111186186A (en) | Double-layer skin wave-absorbing composite material sandwich structure and preparation method thereof | |
| CN112519351B (en) | Homogeneous wave-absorbing shelter deck and preparation method thereof | |
| CN115302915B (en) | Multifunctional ultra-wideband wave-absorbing and multi-frequency invisible profiling door and preparation method thereof | |
| CN103560329A (en) | Method for manufacturing double-layer oscillator bi-color sub-reflector | |
| CN113394568A (en) | Novel ultra-high absorption rate metamaterial wave absorber, wave absorbing unit and wave absorbing structure | |
| CN102316711B (en) | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof | |
| CN115603058A (en) | Three-dimensional metamaterial based on honeycomb structure and preparation method thereof | |
| CN115284700A (en) | Light high-strength composite wave-absorbing foam board and preparation method thereof | |
| CN108649347B (en) | Light cable membrane microstrip phased array antenna structure | |
| CN219610737U (en) | All-carbon fiber integrated high-precision light radar antenna cover panel | |
| CN116632559A (en) | Grille reinforced wave-absorbing bearing integrated structure and preparation method and application thereof | |
| CN115395239B (en) | Inductive band-pass type FSS unit and FSS structure based on triode pattern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |